Adam volunteers his feet for a firewalking experiment, while Karl gives studio audience members hot chillies before attempting to break glass with bad singing.

Adam is put under hypnosis as Karl breaks down the feeling of déjà vu. Plus, the team perform a test on the studio audience to demonstrate how a person's perception of the world can be filtered.

The team examine the differences between men and women's wandering eyes, uncover Leonardo da Vinci's true nature, and share some facts about nose picking.

Adam and Karl look into Einstein's theory of relativity and demonstrate that no one is actually living in the real world because everyone is on a time delay.

Adam and Karl learn what it is like to experience the feeling of zero gravity. Plus, the team unveil a simple zap-prevention device.

The team explore the role of ice in the beginning of life, and the best ways to keep beer cool in an esky.